PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-20:27:50
G01     71.3           32.7               13.6 +/-    2.22      22.6 +/-    2.22  0.090 / 0.180
G07     136.6          25.9               14.2 +/-    1.21      27.2 +/-    1.21  0.060 / 0.120
G11     53.2           30.7               12.5 +/-    1.62      21.5 +/-    1.62  0.100 / 0.130
G13     274.7          38.4               13.2 +/-    1.25      19.8 +/-    1.25  0.070 / 0.110
G15     302.5          15.5               10.5 +/-    1.21      25.9 +/-    1.21  0.090 / 0.090
G17     230.9          69.2               13.7 +/-    0.69      14.5 +/-    0.69  0.070 / 0.080
G18     47.9           17.2               11.4 +/-    1.88      26.8 +/-    1.88  0.100 / 0.110
G19     222.8          41.4               15.3 +/-    1.81      21.8 +/-    1.81  0.140 / 0.130
G28     9.2            60.8               11.9 +/-    1.66      13.5 +/-    1.66  0.030 / 0.040
G30     134.7          61.0               13.9 +/-    0.46      15.7 +/-    0.46  0.030 / 0.040